FUEL INJECTION SYSTEM
8-23
2
Connection of wire harness
ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler, and
check the pins (for bent or bro-
ken terminals and locking condi-
tion of the pins).
Improperly connected
Con-
nect the coupler securely, or
repair/replace the wire harness.
Start switch to ON (no need to
start the engine), and then
check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 3.
3
Wire harness continuity.
Open or short circuit
Replace
the wire harness.
Between intake air pressure
sensor coupler and ECU cou-
pler.
white–white
blue–blue
Between intake air pressure
sensor coupler and joint con-
nector.
black–black
Between joint connector and
ECU coupler.
black/blue–black/blue
Start switch to ON (no need to
start the engine), and then
check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 4.
4
Mounted condition of intake air
pressure sensor.
Check for looseness or pinch-
ing.
Check the mounted position for
correctness.
Improperly mounted sensor
Remount or replace the sensor.
Start switch to ON (no need to
start the engine), and then
check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 5.
5
Defective intake air pressure
sensor.
Execute the diagnostic mode.
(Code No. 03)
Proper display:
Atmospheric pressure at the
current altitude and weather
conditions is indicated while
engine stopping.
0 m above sea level: About 101
kPa (about 3.63 V)
1000 m above sea level: About
90 kPa (about 3.30 V)
2000 m above sea level: About
80 kPa (about 3.00 V)
3000 m above sea level: About
70 kPa (about 2.70 V)
Abnormal display
Intake air
pressure sensor is defective
Replace the intake air pressure
sensor.
Start switch to ON (no need to
start the engine), and then
check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is “Recovered”
Go
to item 7 and finish the service.
Condition is “Detected”
Go to
item 6.
6
Faulty ECU.
Replace the ECU.
Service is finished.
7
Delete the fault code.
Confirm that the fault code has
a condition of “Recovered”
using the Yamaha diagnostic
tool, and then delete the fault
code.
Fault code No.
13
Item
Intake air pressure sensor: open or short circuit detected.
Summary of Contents for YZ450FP 2023
Page 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Page 10: ......
Page 44: ...MOTORCYCLE CARE AND STORAGE 1 32...
Page 61: ...TIGHTENING TORQUES 2 16...
Page 72: ...CABLE ROUTING DIAGRAM 2 27 Frame and battery top view 2 1 B 5 4 3 A 7 4 E 6 D 2 3 C...
Page 76: ...CABLE ROUTING DIAGRAM 2 31...
Page 154: ...REAR BRAKE 4 38 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 26...
Page 194: ...CHAIN DRIVE 4 78...
Page 278: ...TRANSMISSION 5 82...
Page 300: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Page 305: ...IGNITION SYSTEM 8 6...
Page 306: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Page 310: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Page 313: ...CHARGING SYSTEM 8 14...
Page 314: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM B...
Page 339: ...FUEL INJECTION SYSTEM 8 40...
Page 340: ...FUEL PUMP SYSTEM 8 41 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Page 356: ...ELECTRICAL COMPONENTS 8 57...
Page 372: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Page 382: ...CHASSIS 10 9...
Page 384: ......
Page 386: ......
Page 387: ...B YZ450FP 2023 WIRING DIAGRAM BHR 2819U 10_W D indd 1 2022 08 09 13 16 06...